Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9861257 | Physics Letters B | 2005 | 7 Pages |
Abstract
Taking into account the effect of final-state interaction, we calculate the non-zero (naïve) T-odd transverse momentum dependent distribution h1â¥(x,kâ¥2) of the pion in a quark-spectator-antiquark model with effective pion-quark-antiquark coupling as a dipole form factor. Using the model result we estimate the cos2Ï asymmetries in the unpolarized ÏâN Drell-Yan process which can be expressed as h1â¥Ãh¯1â¥. We find that the resulting h1Ïâ¥(x,kâ¥2) has the advantage to reproduce the asymmetry that agrees with the experimental data measured by NA10 Collaboration. We estimate the cos2Ï asymmetries averaged over the kinematics of NA10 experiments for 140, 194 and 286 GeV Ïâ beam and compare them with relevant experimental data.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Zhun Lu, Bo-Qiang Ma,